George norris



'GINORRIS. FILTER.

N 32,202, I Patented Apr. 30,1861.

*ITED STATES PATENT OFFICE.

GEORGE NORRIS, OF NEW YORK, N. Y.

FILTER.

Specification of Letters Patent No. 32,202, dated April 30, 1861.

To all whom it may concern:

Be it known that I, GEORGE NORRIS, of the city, county, and State of NewYork, have invented a new and Improved Filter; and I do hereby declarethat the following is a full, clear, and exact description'of the same,reference being had to the annexed drawings, making apart of thisspecification, in 'which Figure 1. is a vertical central section of myinvention, taken in the line :0, m, Fig. 2; Fig. 2, a horizontal sectionof the same taken in the line y. y. Fig. 1.

Similar letters of reference indicate corresponding parts in the twofigures.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, represents the case or body of the filter which may be of anydesirable form, and provided at its upper end with a screw socket a, forattaching it to the water pipe, the'bottoni of the socket a, beingperforated as shown at b.

B, is a sponge which is fitted in the upper part of the case or body A,the upper part of the sponge being in contact with the perforated bottomof the socket.

O, is a perforated plate which bears against the under side of thesponge and has a tube D, extending down from its center.

E, r is a tube which passes vertically through the lower end of the caseor body A. This tube has a screw thread 0, on it which works in aninternal screw (Z, in the lower 7 part of the case or body A.

The tube 'D, of plate O, extends down within the tube E, the upper partof the latter being perforated as shown at e.

The tube E, within the case or body A, has a ring 7, on it whichprevents it casually dropping from the case or body A.

From the above description it will be seen that by screwing up the tubeE, the perforated plate C, is made to press against the sponge B, andthe latter is compressed and rendered compact so as to form a perfectfiltering medium, the water passing down through the perforations-ofplate G, into the lower part of the case or body and through theperforations of tube E, into the latter, through which it escapes fromthe filter. WVhen filtered water is not required, the tube E, is screweddown and the sponge B, is allowed to expand so that the water will passfreely through it. Thus by this very simple arrangement the water may befiltered or not as desired and therefore no time lost by thecomparatively slow discharge of filtered water when the same is notrequired. This arrangement it will'be seen does not admit of any leakageof the water from the case, or body of the filter, as the latter may bemade of a single piece. The invention therefore differs materially fromthose filters which are provided with cases made in two parts, and whichrequire said parts to be unscrewed in order to shift the position of thefiltering medium, that the water may run through in an unfiltered state.Filters of this kind are liable to leak around the case or body at thejoint or screw and are altogether more complex and more expensive toconstruct than those constructed according to my invention. The tube D,serves as a guide for the plate C, keeping the same in proper positionwithin the case or body A.

Having thus described my invention, what I claim as new and desire tosecure by Let- GEORGE NORRIS. Witnesses M. M. ZROMPTON, C. W. Cow'rAN.

